Cast iron v Steel boilers

[aim plumbing]

Hi all

Im wondering what the main difference between cast iron and steel boilers are? I guess price will be one of the major ones. Does either one become less efficient quicker than the other?
thanks

 

[Billy Bob Bob]

you have lost me mate if your talking about gas boilers heat exchangers are either stainless steel or aluminium silicate

 

[Blackcatgas]

I cant think of a current domestic gas boiler on the market that uses a cast Iron Heat ex, can anybody else?.

 

[Rodreguez]

maybe because the condensate will corrode cast

 

[GQuigley67]

cast rusts also so produces sludge

 

[ecowarm]

oil boilers have a cast boiler and a stainless steel condensate heat exchanger

 

[Dannypipe]

True that Eco, but thats why they tend to sit on the floor.

Cast weighs a bloody ton, and I don't fancy breaking my back lifting it...gladly you won't find it in a modern gas boiler.

 

[ecowarm]

Yes some of the cast wall mounted gas boilers of the 70's and 80's was a nightmare to lift up on my own, but you had to do it

 

[Blackcatgas]

Yes some of the cast wall mounted gas boilers of the 70's and 80's was a nightmare to lift up on my own, but you had to do it

Netaheat! 60kg

 

[Billy Bob Bob]

I cant think of a current domestic gas boiler on the market that uses a cast Iron Heat ex, can anybody else?.

only one that springs to mind is a suprima he band b

 

[GQuigley67]

I helped strip down a big old oil boiler in a school when I just started in my first year 16, was covered head to toe in sludge, about 8 heat exchangers all weighing a ton was heavy stuff nearlly took another guys toe off

 

[aim plumbing]

no, im taking about oil boilers, like the difference between a clyde ckrs 110kw ( cast iron) and clyde unical trio 110kw (steel) whats the pros and cons of choosing each one?